Packing ring



C. L. COOK PACKING RING Filed Jam' 24, 1921 through the ring Patented July 21, 1925a MANU- rnoxme RING.-

Application filed January 24, 1921. Serial No. 439,6Q7.

To all whom it may concern 1 Be it known that I, CHARLES LEE CooK, a citizen of the United States, residing at Louisville, have invented a new and Improved Packing Ring, of which the following is a specification. 7

My invention relates to outwardly expanding packing rings, and more especially to those used in packing pistons.

It has for its object to improve the efliciency of such packing rings.

In the drawings corresponding characters refer to corresponding parts, in the various viewsQ -Figure 1 is a perspective view of my invention; Figure 2 is a perspective view of the main body of the ring; Figure 3' is a perspective view of the gib and key embodied in my invention; Figure 45 1s a sectional'view of a pair of my rings arranged on a piston; and Figure 5 is a perspective viewof a complete ring embodying my invention. A 1

My ring 1 is provided with the radial cut 2 and with the recess '3 extending across said out an equal distance on each side and from the outer edge of the ring partly and from the fiat side of through its thickness. In is recess andextending across the cut 2 provided the partial circumferential slot the ring part way th is 4-, extending an equal distance each side the cut 2, and cess 3.

In the recess 3 beyond the ends of slot 4;, I provide the outwardly converging slots 5 and 6, equidistant from the cut 2.

To provide a steam joint over the cut 2, I provide a" bridge piece or segmental key 10, provided with tongue 11, which fits neatly in slot 4. The key 10 is equal in depth to the recess 3.

Around the key 10 fits neatly a second bridge piece or gib 7, which is provided with tongues 8 and 9 extending into slots 5 and 6 respectively and bearing against their adja cent walls and separated an appreciable displaced near the inner edge ofretance from their remote walls. The end v .faces in the recess in Jefferson County, Kentucky, 7

surfaces of the key 10 are parallel and fit t1ghtly against corresponding parallel surgib 7, so that the gib and the key 10 are free to slide apart while maintaining a tight joint. The gib 7 is free to move outwardly independent of the end walls. of recess 3, and is of a thickness equal to the depth of recess 3.

By reasonof the convergence of slots 5 and 6 and corresponding convergence of tongues 8 and 9, all slight in degree, outward 1 expansion of the ring 1, by wedge action,

produces a slow, but positive outward thrust of the g1b7. his compensates for the wear in the walls of the cylinder. lVhen ring 1 is cut into a plurality of segments for any reason, this ring is used in pairs as shown in Figure 4, Where the adjacent surfaces converge outwardly and are held apart ,by a pair of wedges 12 and springs 13. Th s wedge action tends to hold the rings firmly apart against end surfaces to be packed, and also firmly against the surface of the cylinder.

I do not limit myself further than the claim indicates.

I claim: A resilient split piston ring having a recess extending on opposite sides of the joint tween its ends, said recess opening through the periphery of the ring and through one D of its side faces and terminatingshort of its inner face, the bottom of the recess havin its groove in its inner portion, piece in the outer portion of with the periphery and the said side face of the ring, said bridge piece having outwardly convergent ribs in the corresponding grooves of the recess bottom, and an inner bridge piece behind the outer bridge piece and having a longitudinal rib in the longitudinal groove of said bottom.

CHARLES LEE COOK.

Witnesses:

J. A. SoHNnmER, WM. 0. Gross.

an outer bridge the recess flush s'rarss PATENT OFFICE.

CHARLES LEE 000K, 0F LOUISVILLE, KENTUCKY, ASSIGNOR TO 0. LEE COOK FACTURING- COMPANY, OF LOUISVILLE, KENTUCKY. 

